Range from the cheapest Downlights installation £290 (AI Energy Ltd based in HP21) to the dearest Downlights installation £630 (MLB Electrical Contractors Ltd based in HP1).
Comparing electricians estimates for Downlights installation gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for installing downlights by posting a job to electricians in HP23.